Systems, Methods, and Apparatuses for Resource Monitoring

1. A system comprising: a hardware processor core to decode and execute a single resource monitoring identification (RMID) recycling instruction, a RMID to be a software-defined identification for one or more software threads scheduled to run on a logical processor; memory to store the single RMID recycling instruction that when executed by a hardware processor core recycles the RMID RMID; a plurality of logical processors, each logical processor including associated first storage to store a selected least recently used RMID and second storage to store state for the associated logical processor at the hardware processor core swap on.

2. The system of claim 1 , wherein the each logical processor is a thread.

3. The system of claim 1 , wherein the first storage is a machine state register for the each logical processor in the hardware processor core.

4. The system of claim 1 , wherein the hardware processor core further comprises: a plurality of machine state registers to store resource monitoring data; and a plurality of machine state registers to store an event to be associated with an RMID.

5. The system of claim 4 , wherein the event is memory bandwidth.

6. The system of claim 4 , wherein the event is cache occupancy.

7. The system of claim 1 , wherein the RMID recycling instruction, when executed by the hardware processor core is to cause: a selection of the least recently used RMID; at hardware processor core swap on, a write of the selected RMID to the associated storage for the RMID and a write of a logical processor state to the associated storage for the state; and at hardware processor core swap off, a return of the selected RMID to a pool.

8. The system of claim 7 , wherein the RMID recycling instruction, when executed by the hardware processor core to further cause a selection of a physical RMID.

9. The system of claim 7 , wherein the RMID is to be returned to the pool as a most recently used RMID.

10. The system of claim 1 , wherein the RMID recycling instruction, when executed by the hardware processor core to cause: a selection of an RMID from a least recently used end of a first in, first out queue of RMIDs; a determination that the selected RMID's occupancy is below a threshold; at hardware processor core swap on, a write of the selected RMID to the associated storage for the logical processor and a write of the logical processor state to the associated storage for the state; and at hardware processor core swap off, a return of the selected RMID to a pool.

11. The system of claim 1 , wherein the RMID recycling instruction, when executed by the hardware processor core are to cause: an establishment of a baseline of cache occupancy for an RMID; select an RMID and measure its cache occupancy at the hardware processor core swap on of the logical processor; measure the cache occupancy of the RMID at hardware processor core swap off of the logical processor; update the baseline with a delta value based on the measured cache occupancy to the baseline.

12. A method performed by a system having a hardware processor core and memory, wherein the hardware processor core includes a plurality of logical processors each have associated storage, the method comprising: selecting a least recently used resource monitoring identification (RMID); at hardware processor core swap on, writing the selected RMID to the associated storage for the RMID and writing of a logical processor state to the associated storage for the state; and at hardware processor core swap off, returning of the selected RMID to a pool.

13. The method of claim 12 , further comprising: determining that a cache occupancy associated with the selected RMID is below a threshold.

14. The method of claim 12 , wherein the logical processor is a thread.

15. The method of claim 12 , wherein the storage for the RMID is a machine state register per logical processor in the hardware processor core.

16. The method of claim 12 , wherein the hardware core further comprises: a plurality of machine state registers to store resource monitoring data; and a plurality of machine state registers to store an event to be associated with an RMID.

17. The method of claim 16 , wherein the event is cache occupancy.